Research on the application of MW-level flywheel array for primary frequency regulation in wind farms
This paper addresses the urgent need for primary frequency regulation technology in new energy power stations.It explores the innovative use of megawatt(MW)-scale flywheel arrays,designs an integration scheme for these flywheel energy storage systems,and proposes a control strategy for their application in primary frequency regulation within renewable energy power stations.A 5 MW/175 kWh flywheel array system has been independently connected to the low-voltage side(35 kV)of the main transformer in a renewable energy power station.To thoroughly validate the feasibility and performance advantages of this setup,a series of experimental tests have been conducted.These tests cover various aspects,including rapid switching between charging and discharging for a single unit,response to frequency step disturbances,anti-disturbance performance,and primary frequency regulation dead-zone testing.Furthermore,an analysis of long-term real-time monitoring data from the site reveals that the implementation of MW-scale flywheel arrays significantly improves the primary frequency regulation capability of renewable energy power stations,leading to a faster system response.
new energy stationprimary frequency regulationflywheel energy storageflywheel array system
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